Re: [mkgmap-dev] Filters for overview map

2009-06-17 Thread Steve Ratcliffe
Hi Thanks for working out what goes wrong with very small maps. Although you are correct that the overview map only contains area definition and background polygons which should not be dropped, in the future the overview map should contain real map features so it might be best to specifically

Re: [mkgmap-dev] Filters for overview map

2009-06-16 Thread Elrond
Hi Johann, first some introduction to the overview map: It's only used in mapsource. If you have multiple tiles (for different areas) there is exactly one polygon (rectangle) for each tile. The name for the polygon is the name of the tile plus its map name (the eight digit name). It has a

Re: [mkgmap-dev] Filters for overview map

2009-06-16 Thread Elrond
Hi, My current conclusions from both thread parts: 1) I should only disable the SizeFilter (we really, really don't want to drop any polygon). 2) We should fix DP. Does that make sense? Elrond ___ mkgmap-dev mailing list

Re: [mkgmap-dev] Filters for overview map

2009-06-16 Thread Thilo Hannemann
Hi, Am 16.06.2009 um 20:39 schrieb Elrond: My current conclusions from both thread parts: 1) I should only disable the SizeFilter (we really, really don't want to drop any polygon). For the overview map obviously not. 2) We should fix DP. From what you explained about the overview map

Re: [mkgmap-dev] Filters for overview map

2009-06-16 Thread Elrond
Hi, On Tue, Jun 16, 2009 at 10:49:45PM +0200, Thilo Hannemann wrote: Hi, Am 16.06.2009 um 20:39 schrieb Elrond: My current conclusions from both thread parts: 1) I should only disable the SizeFilter (we really, really don't want to drop any polygon). For the overview map obviously

[mkgmap-dev] Filters for overview map (was: Overview map: tiny patch/review series)

2009-06-15 Thread Elrond
Hi, okay, first part. In my testing it turned out, that the SizeFilter and the DouglasPeuckerFilter either dropped my small rectangles or converted them to a triangle. Removing the filters fixed this for me. If you think, that the generated rectangles should be large enough, so that they're

Re: [mkgmap-dev] Filters for overview map

2009-06-15 Thread Johann Gail
Hi, okay, first part. In general i find it an good idea to split up a problem into small parts, but at the moment I cant see the whole thing. Why is it neccessary break things down to smaller rectangles to get an improvement in alignment? Yes, I have seen this error and up to now i